How to deal with damp walls

Wall anti moisture can be treated by strengthening ventilation, using dehumidification equipment, repairing leaks, applying moisture-proof coatings, and keeping the room dry. Wall moisture is usually caused by high environmental humidity, wall water seepage, ineffective waterproof layer, large temperature difference between indoor and outdoor, and poor drainage.

1. Strengthening ventilation

Improving indoor air circulation is the fundamental method to solve wall moisture. In humid weather, windows can be opened regularly for ventilation to promote water vapor evaporation. Exhaust fans can be installed in areas that are prone to moisture, such as bathrooms and kitchens, to accelerate the discharge of moisture. Avoid drying clothes indoors to reduce additional sources of moisture. Pay attention to outdoor humidity during ventilation, and reduce window opening time on rainy or foggy days.

2. Using dehumidifiers or air conditioning dehumidifiers can effectively reduce air humidity. Choose dehumidification equipment suitable for the room area and regularly clean the water accumulation box. Closets and other enclosed spaces can be filled with activated carbon or dehumidifiers to absorb moisture. When using heating in winter, a humidifier can be used to adjust the humidity balance and avoid excessive dryness or humidity.

3. Repair Leakage

Check whether there are leakage points on the exterior walls, roofs, and pipelines, and promptly repair cracks or replace aging waterproof layers. The waterproofing of the bathroom should be redone to a height of 1.8 meters, and the area around the floor drain needs to be given special attention. Strengthen the sealing at the water pipe joint to avoid hidden leakage. Check if the eaves drainage channel is blocked before the rainy season to ensure timely drainage of rainwater.

4. Apply moisture-proof coating

Use breathable anti mold and moisture-proof coating to treat the wall surface, and thoroughly dry the base layer before construction. Waterproof mortar can be used as a base for damp areas such as basements, followed by the application of specialized moisture-proof primer. Materials such as diatomaceous earth have the function of regulating humidity and are suitable for environments with large humidity fluctuations. Paint construction should avoid rainy weather and ensure complete dryness.

5. Keep the room dry

Reduce indoor water vapor production, use a range hood when cooking, and wipe off water stains promptly after bathing. Keep furniture at a certain distance from the wall to facilitate air circulation. Carpets and fabric furniture are prone to moisture absorption and require regular drying. Avoid drying clothes indoors in winter and choose a dryer for treatment. Watering the green plants appropriately to avoid the soil being too wet and affecting indoor humidity. Long term humid environments are prone to the growth of mold, which can affect respiratory health. In addition to the above measures, regular inspections of the building structure can be carried out, and old buildings should focus on investigating the aging problem of the waterproof layer. Preventive measures should be taken before the rainy season, and any peeling or mold on the wall should be promptly removed and disinfected. Maintaining appropriate indoor temperature and humidity can help reduce wall moisture reflux. If the problem of moisture persists, it is recommended to consult professional construction personnel to investigate hidden engineering issues.